45, COENHILL, E.G., AND 122, REGEN1 STREET, W., LONDON. 



287 



1130 Negretti and Zambra's Improved Ordnance Pattern 15-inch Dumpy Y 

 Level, with reversing and adjusting Y's to telescope, divided Level, 

 Silver ring Compass, Tangent Screw and Clamp on limb, parallel plates, 

 mahogany tripod stand and Box with strap (fig. 1130). 



18 18 

 Ditto ditto 24-inch 22 



Theodolites and Levels mounted with improved Locking Plates, as fig. 1114, 

 at about 35s. to 50s. extra charge, according to the size of the instrument. 



1131 Solid Leather Cases for Theodolites, with Straps, 35s. 200 



250 



FIG. 1135. 



FIG. 1132. 



FIG. 1134. 



Each 

 s. d. 



Each 

 s. d. 



1132 Drainage Level, of Brass, with plain sights, ball-and- 



socket joint (fig. 1132) . . . ... . . 1 15 2 10 



1132* Ditto ditto with Tripod Stand : 330 



1133 Improved Drainage Level, with adjustment to the 



sights, ball-and-socket joint, and tripod stand . 440 



1133* 4-inch Pocket Spirit Level, or Clinometer, brass frame, with sights and 

 graduated arc for determining the inclination of strata, &c., with socket 

 for staff, in mahogany box (see also Inclinometer) . . . 3 10 



1134 Drainage Level, Ordnance Pattern, best mounted, with plain sights, spring 



adjustments to level, in mahogany box (fig. 1134) with tripod stand 550 



